why do scientist think the earths core have iron in it .

Answers

Answer 1
because to protect the earth since it’s round and big

Related Questions

WILD GUESS
OUT OF BAKUGOU SHOTO AND DEKU


GUESS WITCH ONE I SIMP FOR

Answers

Answer: all of them?

Explanation:

Answer:

Deku.

Explanation:

What is the answer?

Answers

Answer:

Option A

Explanation:

The atomic number is the number of protons in the nucleus of an atom.

Look at the dots around each symbol and the energy levels from the resources above;
Answer the questions in the text entry option for this assignment.
Copy and paste questions and respond in complete sentences.
Include a space between each question.
Be specific with your responses for each question. Assume your reader has no knowledge of the subject and you are teaching them via your answers.
Please answer the following questions:
Why does Na have only one dot?
Why do none of these diagrams show more than 8 dots?
What relationship do you notice between the dots in these two charts?
The number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table. Why? (Hint: Octet Rule (Links to an external site.))

Answers

Hello! Here's the answer I was able to come up with:

Why does Na have only one dot?

Sodium, or Na, has only one valence electron.  (This makes the atom tend to participate in ionic bonding and "give" its single valence electron to an atom like chlorine.)

Why do none of these diagrams show more than 8 dots?

It is physically impossible for an atom to have more than 8 electrons in its valence layer, according to the Octet Rule.

What relationship do you notice between the dots in these two charts?

The dot diagram for each element represents the number of electrons each element will have in its outermost, or valence, shell. (2-8-8)

The number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table. Why?

An atom can have a maximum of two electrons in its innermost layer. Hydrogen and helium have only one and two electrons, respectively, so they don't have enough electrons to actually have more than one layer. Therefore, their outermost layer is, in fact, their only layer. This is why the number of dots that hydrogen and helium have in their dot diagram is the same as the number of electrons shown for them on the Periodic Table.

Don't copy this word for word! You will most likely be in trouble for plagiarism.  Instead, rewrite these ideas in your own words, or paraphrase. Good luck, and I know you can do it! ♥  

Human body cells are made by doing what ? ​

Answers

Answer:

When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.

Explanation:

Calculate the change in heat (Q) that occurs when 7.58grams of steam at 101°C cools to liquid water at 40°C. (cp = 4.184 J/g°C)

Answers

Answer:

Q = 19065.4 J

Explanation:

Q₁ = the required energy for phase change of H₂O from vapor to liquid

Q₁ = mass of H₂O * heat of vaporization

Q₁ = 7.58 g * 2260 J/g

Q₁ = 17130.8 J

Q₂ = energy required to cool the water fro 101°C to 40°C

Q₂ = mass of H₂O * specific heat of H₂O * ΔT

Q₂ = 7.58 × (4.184 J/gC) × (101 - 40)

Q₂ = 1934.6 J

Q = Q₁ + Q₂

Q = (17130.8 + 1934.6) J

Q = 19065.4 J

1. Which of the five types of reactions is taking place in the whoosh bottle? Justify your answer with evidence from the video.

Answers

Answer:

Other times I place a candle in water and cover it with a glass jar  .

Explanation:

only to ... Many of you may already know this as the Whoosh Bottle demo due ... I have used this demo in the past for topics like exothermic reactions, combustion reactions, ... This adds to the evidence of a partial vacuum created in the bottle

what is change in science

Answers

Answer:

Scientific change is: "Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. "

Explanation:

how many moles of MgO can be made from 10 moles of fe2O3?​

Answers

Answer:

Fe 2 O3 .

Explanation:

Transferring charge by touching or rubbing is called-


A) charging by contact
B) convection
C) insulation
D) none of these

Answers

Answer:

A) Charging by contact

Explanation:

Transfer of heat by direct contact, Heat energy is conducted from the hotter medium to the cooler medium

True or False: Tsunamis always look like a towering wall of water approaching the beach.

Answers

Answer:

false

Explanation:

Answer:

True

Explanation:

they can get up to several hundreds of feet.

write the electronic configuration of an Na+ and CL-1​

Answers

Answer:

Na+ lost one electron:    1s2 2s2 2p6

Cl- gained an electron:   1s2 2s2 2p6 3s2 3p6

Explanation:

Help which one will it be

Answers

Answer:

D

Explanation:

Answer:

the answer is D I did that one in 5th grade

HELP WITH THIS WORD PROBLEMStudents want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
Bubbles were produced during the reaction, which meant that a gas was being produced
.The plastic bag did not change in any way, indicating that it was not involved in the reaction.
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

Answers

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

Conservation of atoms is just conservation of mass.

HELP PLEASE ||Suppose you add water to a 6 g of sugar to make a solution with a concentration of 3 g/L. What is the total volume of the solution?

Answers

Answer:

2 L

Explanation:

Divide the mass by the concentration to find the volume.

(6 g)/(3g/L) = 2 L

According to the concept of solubility, in order to make solution of sugar the total volume of solution is 2 g/L.

What is solubility?

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

In order to calculate total volume of solution divide mass/ concentration that is 6/3=2 g/L.

Thus, the total volume of the solution is 2 g/L.

Learn more about solubility,here:

https://brainly.com/question/29589228

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How many oxygen molecules are in this compound: H2O

Answers

Answer:

1 oxygen molecule is present in H₂O

Explanation:

How to find out?

There's a 2 beside H in H₂O showing that there are '2 atoms of hydrogen'

However there's no number to the right of Oxygen, so it is just 1.

Calculate: A. Mercury has a specific Heat Capacity of 0.14 J/goC. How much heat is needed to raise the thermometer temperature 15 oC to 95 oC. There is 5 g of mercury in the thermometer.

Answers

Answer:

[tex]\boxed {\boxed {\sf 56 \ Joules}}[/tex]

Explanation:

We are given the mass, specific heat, and temperature, so we must use this formula for heat energy.

[tex]q=mc \Delta T[/tex]

The mass is 5 grams, the specific heat capacity is 0.14 Joules per gram degree Celsius. Let's find the change in temperature.

ΔT= final temperature - initial temperature ΔT= 95°C - 15°C = 80°C

We know the variables and can substitute them into the formula.

[tex]m= 5 \ g \\c= 0.14 \ J/ g \ \textdegree C \\\Delta T= 80 \ \textdegree C[/tex]

[tex]q= (5 \ g )( 0.14 \ J/ g \ \textdegree C ) ( 80 \ \textdegree C)[/tex]

Multiply the first numbers. The grams will cancel.

[tex]q= 0.7 \ J/ \textdegree C(80 \ \textdegree C )[/tex]

Multiply again. This time the degrees Celsius cancel.

[tex]q= 56 \ J[/tex]

56 Joules of heat are needed.

How are igneous and sedimentary rocks similar? A.They are both formed by erosion. B.They are both formed from cooled lava. C.Heat and pressure can turn them into lava. D.Heat and pressure can turn them into metamorphic rock.​

Answers

Answer:

D

Explanation:

I learned this last year.

which horizon has the least weathered rocks? How do you know?

Answers

Answer:

C: The C horizon is a subsurface horizon. It is the least weathered horizon. Also known as the saprolite, it is unconsolidated, loose parent material. The master horizons may be followed by a subscript to make further distinctions between differences within one master horizon.

Explanation:

15. What is the molar mass of H2CO3?
(atomic mass: C = 12.01, H = 1.01, 0 = 15.99)

Answers

Answer:

62.00

Explanation:

H2 means that there are two moles of hydrogen so multiply the atomic mass by two (1.01 × 2 = 2.02)

C only has one mole sp leave 12.01 alone

And multiply oxygen by 3 because there are three moles of oxygen (15.99 × 3 = 47.97)

Add them all together!

2.02 + 12.01 + 47.97 = 62.00 for molar mass

Which molecule has the most atoms?
A. CO2
B. N202
C. CO
D. H₂O S​

Answers

CO2 ~ 1 atom
N202 ~ 4 atom
CO ~ 2 atom
H2OS ~ 3 atom

B

What is the un-balanced equation for this
reaction?
Mg +0 --> Mgo
Mg + 02
--> Mg02
Mg + 02 --> Mgo

Answers

Answer:

2Mg + O2 → 2MgO

Explanation:

stoichiometrically when 0.01 kg of CaCO3 is heated to produce CO2, occupied a volume at STP is
a. 2.2414 dm^3
b. 22.414 dm^3
c. 22414 dm^3
d. 224014 dm^3

Answers

Answer:

anjsbzhahxbVAbzbsbsbsbsjsjsdp

HELP PLEASEEEE!!!!!!!!

Nitrogen (N)) reacts with hydrogen (H) to produce ammonia (NH3). Represent this reaction in terms of:
Particles
b. Moles
C. Mass

Answers

Answer:

C the answer is c

Explanation:

ITS C

how much is the mass of a man if
he has to do 2500 joules of work in
climbing a tree 5 meters tall​

Answers

Answer:

50kg

Explanation:

Using the formula for potential energy, which is the amount of energy due to position;

P.E = m × g × h

Where;

m = mass (kg)

g = acceleration due to gravity (10m/s²)

h = height (metres)

According to the information provided in this question, m = ?, P.E = 2500J, h = 5m

Using P.E = m × g × h

m = P.E/gh

m = 2500/(5 × 10)

m = 2500/50

m = 50kg

The mass of the man is 50kg.

A mixture of PCl5(g), PCl3(g), and Cl2(g) is in a 1.00 L reaction vessel. The total pressure of the reaction system is 1.40 atm at equilibrium. Then the volume of the reaction vessel is reduced from 1.00 L to 0.50 L and equilibrium is re-established at constant temperature. What is the total pressure of the system at this point?

Answers

Answer:

The total pressure immediately after the volume reduction is 2.8 atmospheres

Explanation:

The question parameters are as follows;

The initial volume of the reaction vessel, V₁ = 1.00 L

The initial pressure of the reaction system, P₁ = 1.40 atm

The final volume of the reaction system, V₂ = 0.50 L

With the assumption that the gas mixture behaves as an ideal gas, and the temperature is constant, by Boyle's law we have;

P₁·V₁ = P₂·V₂

Where;

P₁ = The initial pressure in the reaction vessel

V₁ = The initial volume in the reaction vessel

P₂ = The total final pressure in the reaction vessel after the reduction in the vessel volume

V₂ = The final volume in the reaction vessel

∴ P₂ = P₁·V₁/V₂

From which we have;

P₂ = 1.40 atm × 1.00 L/(0.50 L) = 2.8 atm

The total final pressure in the reaction vessel, P₂ = 2.8 atm.


What is the answer
A. North
b. South
C.east
D west

Answers

I think it’s C because he would push off of the sled

Guys I need ur help I might as well just ask ur smarties for help ahah n yup I’ll be brainlisting;)


1) What have been the wider effect on the community of nuclear accidents? (Chernobyl)





Answers

Answer:

Hey sis

will you be my sis??

please give reply

I will be waiting

and fol.low.me



The teacher asked the students to design an experiment that would demonstrate that temperature will affect the pressure of a gas. Which of the
following would be a valid experiment that shows the correct relationship between gas temperature and pressure?

Answers

The correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.

How are pressure and temperature of a gas related ?

According to Gay lussac's law, the temperature and pressure of a gas are directly proportional to each other, provided the volume is constant.

When the temperature of a gas is increased, the molecules gain more kinetic energy and hence the frequency of them hitting the walls of the container increases which basically implies that the pressure increases.

On the other hand when the temperature is low, the molecules do not have substantial kinetic energy to hit the walls of the container frequently, that is the pressure decreases.

 

When the bicycle tires were kept out in the winter, the low temperature decreased the air pressure inside the tires. While when they were warmed at room temperature, the pressure inside the tires increased.

Therefore, the correct option is option A.  when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.

   

To know more on Gay lussac's law, click on

https://brainly.com/question/30758452

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i just need an explanation :) so the problem was " what is the mass of 5 molecules of water(H2O) , in grams?" my teacher said the answer is 1.50 x 10^-22 but i dont understand why. why is it not 1.50 x 10^24, why is the exponent negative?

Answers

Answer:

Explanation:

The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles

2A → B + C The above reaction is run and it is found that a plot of the natural log of the concentration versus time is linear. This indicates that the reaction is ...

Answers

Answer:

zero order reaction

Explanation:

The seem to be a reaction is zero order as the data only fits to zero order integrated rate law.

Integrated rate law:

[A] = [A]_0 – kt

Here y = [ A] and slope is -k , so when we plot concentration of A with respect to t then we get the equation in the form of line

y = mx + c

So the answer Zero order in [A]

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A) 1080C) 720B) 1800D) 1620 When a large rock falls down a slope and breaks into small pieces, this is called _____________ _______________.Group of answer choices Select all of the examples of a scenario in which the firm is demonstrating financial weakness. a. An ROA of 0.7 when the industry average is 1.4. b. A current ratio of 0.5. c. An ROE of 1.4 when the industry average is 1.15. d. A quick ratio above the industry average of 0.9. e. A fixed asset ratio of 0.6 when the industry average is 1.1. f. A debt capital ratio of 0.7 when the industry average is 0.15 I NEED HELP NOW PLZ!!! how could you weaken the force of gravity between cars and the Earth?**I WILL MARK BRAINLEST** Need help please confused /This is journalism/ PLEASE HELP DUE REALLY SOON!! 50 POINTS AND BRAINLIEST PLEASE HELP!!!!!You are writing a story about the opening day of the annual state fair. The story is going to air the day before the fair officially opens. Answer the following questions before preparing your news story.What should the tone of the news story be?What types of images (non-video) should you show?What types of videos can you show?What story form(s) do you think you will use?NONHELPFULL ANSWERS WILL BE REPORTED/ please help soon!!! In matrix form structure PVC stands for what? please help i need to create a photosynthesis model. Construct a model to show the movement of matter and energy from plants into other organisms. Show how mass and energy are conserved before and after each interaction. For example, the beginning substances before an interaction equal the ending substances, and vice versa. also add a few sentences explaining what you did in the model I have no idea what the answer is but ill give points for CORRECT answers only!!! Help me please , due soon HELP HELP HELP HELP HELP!Distribute the following expression, and type the equivalent expression into the text box.3(12x-6) Which of the following best describes term response variable if a parallelogram is 1.9ft at its base and 1.5 at its height what's its area? All of the following have contributed to Europes pollution problem by being released into the water supply, except __________.A.metalsB.fertilizersC.pesticidesD.carbon dioxide What did Hammurabi's Code promote?HierarchyMatriarchyPolytheismEquality Solve the equation x = 5/3 (pie) (r^3) for r. Graph the equationy = -3. Determine theslope of the line HELP PLEASEEEE!!!!!!!!Nitrogen (N)) reacts with hydrogen (H) to produce ammonia (NH3). Represent this reaction in terms of:Particlesb. MolesC. Mass what is the area of this square (look at the picture)